WChPT analysis of twisted mass lattice data [chapter]

S. Aoki, O. Bär
The IVth International Conference on Quarks and Nuclear Physics  
We perform a Wilson Chiral Perturbation Theory (WChPT) analysis of quenched twisted mass lattice data. The data were generated by two independent groups with three different choices for the critical mass. For one choice, the so-called pion mass definition, one observes a strong curvature for small quark masses in various mesonic observables ("bending phenomenon"). Performing a combined fit to the next-to-leading (NLO) expressions, we find that WChPT describes the data very well and the fits
more » ... ll and the fits provide very reasonable values for the low-energy parameters.
doi:10.1007/978-3-540-72516-9_104 fatcat:3vxq3uyj7zfgvecl4f7mcvaauu